Biomedical Engineering Reference
In-Depth Information
Fig. 10
On-chip
measurement setup of the
System-on-a-Chip (SoC)
ultra-wideband (UWB) pulse
radar
Fig. 11
Measured output of
the radar.
a
The delay of the
delay generator (DG) is
varied as a ramp around the
value of the delay of the
cables (
∼
8 ns).
b
The delay
of the DG is chosen equal to
two values, one
corresponding to perfect time
alignment between output of
the shaper and output of the
low-noise amplifier (LNA),
and one corresponding to the
time of total misalignment
(i.e., no overlapping)
Since the delay of cables and attenuators is fixed, the simulation of a moving
target has been performed by varying the delay of the DG. In the first experiment
the DG has been driven by a ramp (with a rise time and a fall time of 0.5 s each) in
order to span the range of delays of interest (around 8 ns).The measured output of
the radar is shown in Fig.
11
a.
Note that the output of the radar is constant when the output of the LNA and the
output of the shaper are not time aligned (i.e., the output of the multiplier is zero),
and it varies when the two signals overlap themselves in time.
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